US8000667B2 - System and method for compensating for modulation induced frequency shift during transmission of a radio frequency signal - Google Patents
System and method for compensating for modulation induced frequency shift during transmission of a radio frequency signal Download PDFInfo
- Publication number
- US8000667B2 US8000667B2 US11/346,991 US34699106A US8000667B2 US 8000667 B2 US8000667 B2 US 8000667B2 US 34699106 A US34699106 A US 34699106A US 8000667 B2 US8000667 B2 US 8000667B2
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- US
- United States
- Prior art keywords
- frequency
- carrier signal
- signal
- transmitter
- carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/20—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver
- H04B1/202—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver by remote control
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
- G07C2009/00793—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by Hertzian waves
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
- G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
- G07C2209/61—Signal comprising different frequencies, e.g. frequency hopping
Definitions
- the present invention relates generally to the field of electronic transmitters and transceivers for use with vehicles. More specifically, the present invention relates to electronic transceivers that are configured for use with remote control systems.
- Electronically operated remote control systems such as garage door opener systems, home security systems, home lighting systems, gate controllers, etc., typically employ a portable, hand-held transmitter (i.e., an original transmitter) to transmit a control signal to a receiver located at the remote control system.
- a garage door opener system typically includes a receiver located within a home owner's garage and coupled to the garage door opener.
- a user presses a button on the original transmitter to transmit a radio frequency signal to the receiver to activate the garage door opener to open and close a garage door.
- the receiver is tuned to the frequency of its associated original transmitter and demodulates a predetermined code programmed into both the original transmitter and the receiver for operating the garage door.
- a trainable transmitter or transceiver may be provided in a vehicle for use with remote control systems.
- a trainable transmitter is configurable by a user to activate one or more of a plurality of different wireless control system receivers using different radio frequency messages.
- a user may train the trainable transmitter to an existing original transmitter by holding the two transmitters in close range and pressing buttons on the original transmitter and the trainable transmitter.
- the trainable transmitter identifies the type of remote control system associated with the original transmitter based on a radio frequency signal received from the original transmitter. For example, the trainable transmitter may identify and store the control code and carrier frequency of the original transmitter radio frequency (“RF”) control signal.
- the receiver may learn a transmitter identifier of the trainable transmitter.
- the trainable transceiver and receiver must also be “synchronized” so that the counters of the trainable transmitter and the receiver begin at the same value. Accordingly, the user presses a button on the remote control system receiver to put the receiver in a training mode. A button on the trainable transceiver may then be pressed, for example, two to three times, to transmit messages so the receiver may learn the transmitter identifier, complete synchronization of the receiver and the trainable transmitter and confirm that training was successful. Once trained, the trainable transceiver may be used to transmit RF signals to control the remote control system.
- a user presses an input device, e.g., a button, of the trainable transmitter that has been trained to a particular remote control system, for example, a garage door opener.
- the trainable transmitter retrieves the frequency and control data associated with the button pressed, generates a carrier signal with the appropriate carrier frequency and modulates control data on the carrier signal to generate an RF control signal to control the garage door opener.
- the RF control signal is then transmitted to the garage door opener.
- various RF characteristics of the trainable transmitter circuitry e.g., RF characteristics of an Application Specific Integrated Circuit (ASIC) used for the RF circuitry
- ASIC Application Specific Integrated Circuit
- RF characteristics may cause a frequency shift during periods when data is modulated on the RF carrier signal.
- the frequency shift results in a wider bandwidth of the transmitted RF control signal.
- the receiving bandwidth of a receiver associated with a remote control system may be relatively narrow. Therefore, the wider bandwidth of the RF control signal caused by a shift in carrier frequency may adversely affect performance of the transmitter and the ability of a remote control system receiver to receive and respond to the RF control signal transmitted by the transmitter.
- an electronic transmitter may be described herein with reference to systems for trainable transmitters or rolling code transmitters, one or more of the systems and methods for compensating for frequency shifting may be applied to, and find utility in, other types of transmitters as well.
- one or more of the systems for compensating for frequency shifting may be suitable for use with fixed code transmitters, single frequency transmitters, etc., all of which may require some form of compensation for frequency shifting.
- a method for compensating for frequency shifts during transmission of an RF control signal includes receiving a request to enter a transmission mode from a user, generating a carrier signal having a frequency, measuring the frequency of the carrier signal, and comparing the measured frequency of the carrier signal to a desired frequency. The method includes determining if there is a difference between the measured frequency and the desired frequency, and if so, determining if data is being modulated on the carrier signal. The method further includes applying a correction to the carrier signal frequency if data is not being modulated on the carrier signal.
- the system also includes a voltage controlled oscillator circuit coupled to transceiver, such that the voltage controlled oscillator circuit is configured to generate a control signal, including a carrier frequency.
- the system further includes a control circuit coupled to the voltage controlled oscillator circuit, such that the control circuit is configured to measure the carrier frequency of the control signal generated by the voltage controlled oscillator circuit.
- the carrier frequency of the control signal is compared to a desired frequency of the remote electronic device, such that if a difference exists between the value of the carrier frequency and the desired frequency, the control circuit determines if data is being modulated onto the carrier frequency of the control signal.
- FIG. 1 is a perspective view of a vehicle having an electronic transmitter in accordance with an embodiment.
- FIG. 2 is a schematic block diagram of an electronic transmitter in accordance with an embodiment.
- FIG. 3 illustrates a method for compensating for frequency shifts during transmission of an RF signal in accordance with an embodiment.
- FIG. 1 is a perspective view of a vehicle including an electronic transmitter in accordance with an embodiment.
- a vehicle 10 which may be an automobile, truck, sport utility vehicle (SUV), mini-van, or other vehicle, includes an electronic transmitter 16 .
- an electronic transmitter may be embodied in other systems such as a portable housing, key fob, key chain or other hand-held device.
- electronic transmitter 16 is illustrated mounted to an overhead console of vehicle 10 .
- one or more of the elements of electronic transmitter 16 may be mounted to other vehicle interior elements such as a visor 17 , an instrument panel 18 , a rearview mirror (not shown), a dashboard, seat, center console, door panel, or other appropriate location in the vehicle.
- Electronic transmitter 16 may be configured to control a remote control system 14 , such as a garage door opener, home security system, home lighting system, gate controller, etc.
- Electronic transmitter 16 is trained using an original transmitter 12 used to control remote control system 14 .
- Original transmitter 12 is a transmitter, typically a hand-held transmitter, which is sold with remote control system 14 or as an after-market item, and which is configured to transmit an activation signal at a predetermined carrier frequency and having control data configured to actuate remote control system 14 .
- original transmitter 12 can be a hand-held garage door opener transmitter configured to transmit a garage door opener signal at a frequency, such as 355 Megahertz (MHz), wherein the activation signal has control data, which can be fixed code or cryptographically-encoded code (e.g., a rolling code).
- remote control system 14 may be a garage door opener system configured to open a garage door in response to receiving the activation signal from original transmitter 12 .
- remote control system 14 includes an antenna (not shown) for receiving wireless signals including control data which would control remote control system 14 .
- an activation or control signal A is transmitted from original transmitter 12 to electronic transmitter 16 in the vehicle 10 .
- Electronic transmitter 16 receives the control signal, identifies the control data (e.g., fixed or rolling code data) and carrier frequency of the control signal and stores this information for later retransmission.
- Electronic transmitter 16 may then be used to selectively generate and transmit a control signal T with the learned frequency and control data to the remote control system 14 , such as a garage door opener, that is responsive to the control signal.
- the remote control system 14 such as a garage door opener
- FIG. 2 is a schematic block diagram of an electronic transmitter in accordance with an embodiment.
- Electronic transmitter 16 includes a transmitter circuit 20 and a receiver 21 that are coupled to an antenna 38 .
- a single dual function transceiver having transmit and receive circuitry may be provided in place of a separate receiver and transmitter.
- Transmitter circuit 20 and receiver 21 are also coupled to voltage controlled oscillator circuitry (“VCO”) 40 , hereinafter referred to as VCO circuitry 40 , and control circuit 22 .
- VCO voltage controlled oscillator circuitry
- Control circuit 22 may include various types of control circuitry, digital and/or analog, and may include a microprocessor, microcontroller, application specific integrated circuit (ASIC), or other digital and/or analog circuitry configured to perform various input/output, control, analysis, and other functions to be described herein.
- VCO voltage controlled oscillator circuitry
- VCO circuitry 40 is configured to generate a carrier signal at a specific frequency (e.g., the frequency identified or learned in a training mode) during training and transmission modes of the transmitter 16 .
- a specific frequency e.g., the frequency identified or learned in a training mode
- the carrier signal generated by the VCO circuitry 40 is modulated with control data supplied by control circuit 22 .
- a switch interface 24 is coupled to a plurality of buttons or switches. Alternatively, other user input devices such as knobs, dials, etc., or a voice actuated input control circuit configured to receive voice signals from a vehicle occupant may be provided to receive user input.
- switch interface 24 is coupled to one terminal of each of three push button switches 26 , 28 and 30 , which have their remaining terminal connected to ground.
- Switches 26 , 28 and 30 may each be associated with a separate remote control system to be controlled, each of which may have its own unique operating RF frequency, modulation scheme, and/or control data.
- switches 26 , 28 and 30 each correspond to a different radio frequency channel for transmitter circuit 20 . It should be understood, however, that each channel may be trained to the same original transmitter, if desired, or to different original transmitters.
- Switch interface 24 couples signal information from switches 26 , 28 and 30 to the input terminals of control circuit 22 .
- Control circuit 22 includes data input terminals for receiving signals from the switch interface 24 indicative of the closure states of switches 26 , 28 and 30 .
- a power supply 32 is conventionally coupled to the various components for supplying the necessary operating power in a conventional manner.
- Control circuit 22 is also coupled to a display 36 which includes a display element such as a light emitting diode (LED).
- Display 36 may alternatively include other display elements, such as a liquid crystal display (LCD), a vacuum fluorescent display (VFD), or other display elements.
- Control circuit 22 includes a memory 34 including volatile and/or non-volatile memory to, for example, store a computer program or other software to perform the functions described herein.
- Memory 34 is configured to store learned information such as control data and carrier frequency information that may be associated with switches 26 , 28 and 30 .
- each switch or button 26 , 28 and 30 may be associated with a separate remote control system, such as different garage door openers, electronically operated access gates, house lighting controls and other remote control systems, each which may have its own unique operating RF frequency, modulation scheme and control data.
- Transmitter circuit 20 and receiver 21 communicate with the remote control system 14 and the original transmitter 12 via antenna 38 .
- Receiver 21 may be used to receive signals via antenna 38 and transmitter circuit 20 may be used to transmit signals via antenna 38 .
- a separate antenna may be used with transmitter 20 and with receiver 21 (e.g., separate transmit and receive antennas may be provided in the electronic transmitter).
- electronic transmitter 16 is configured to transmit a wireless control signal having control data that will control remote control system 14 .
- VCO circuitry 40 and transmitter circuit 20 are configured, under control from control circuit 22 , to generate a control signal having a carrier frequency and control data associated with the particular trained channel.
- VCO circuitry 40 generate a carrier signal at the selected frequency for the trained channel and then the control data is modulated on the carrier signal.
- the control data may be modulated onto the control signal using, for example, frequency shift key (FSK) modulation, amplitude shift key (ASK) modulation or other modulation technique.
- the control data on the control signal may be a fixed code or a rolling code or other cryptographically encoded control code suitable for use with remote control system 14 .
- electronic transmitter 16 may learn the control code and carrier frequency for remote control system using original transmitter 12 for remote control system 14 .
- the control signal may then be transmitted via antenna 38 to the remote control system 14 .
- the carrier frequency may be shifted from the desired frequency as a result of RF characteristics of the circuitry of the electronic transmitter 16 .
- RF components of electronic transmitter 16 may be implemented on an ASIC (application specific integrated circuit). RF characteristics of the ASIC may cause a frequency shift in the frequency of the carrier signal generated by VCO circuitry 40 (shown in FIG. 2 ) which can result in a wider bandwidth (e.g., the effective bandwidth) of the transmitted control signal.
- ASIC application specific integrated circuit
- a request to transmit an RF control signal (e.g., to enter a transmission mode) is received from a user at the electronic transmitter 16 .
- a user may provide a request by actuating a pushbutton (e.g., pushbutton 26 shown in FIG. 2 ) of the electronic transmitter.
- a display may be used to indicate to the user that a transmission mode was initiated, for example, a display element such as an LED indicator may be lit or flash to provide feedback to the user.
- a request to enter a transmission mode may be provided by a combination of key presses using input devices of the electronic transmitter, by receiving a message on a vehicle bus, or by selecting a menu item on a display, such as on a user interface.
- the frequency and control data associated with the user input is retrieved from memory.
- a carrier signal is generated at the retrieved frequency by VCO circuitry 40 (shown in FIG. 2 ).
- the frequency of the carrier signal is measured, for example, control circuit 22 (shown in FIG. 2 ) may be configured to measure the frequency of the carrier signal. The measured frequency is then compared to the desired frequency value in step 310 to determine if there is a difference. If there is not a difference, at step 312 , the measurement and comparison steps are repeated for the duration of the signal transmission.
- step 312 it is determined whether data is being modulated onto the carrier signal at step 314 . If data is not being modulated, a correction factor (e.g., a correction pulse) is applied to the VCO circuitry 40 at step 316 to adjust the frequency of the carrier signal up or down as needed to keep the frequency as close to the desired frequency as possible. The measurement and comparison steps are repeated for the duration of the signal transmission. If data is being modulated onto the carrier signal, a correction is not applied to the VCO circuitry at step 318 and the measurement and comparison steps are repeated.
- a correction factor e.g., a correction pulse
- a correction factor may be applied to the VCO circuitry 40 (at step 316 ) to adjust the frequency of the carrier signal when data is being modulated. If data is not being modulated onto the carrier signal, a correction factor is not be applied to the VCO circuitry (at step 318 ).
Abstract
Description
Claims (19)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/346,991 US8000667B2 (en) | 2006-02-03 | 2006-02-03 | System and method for compensating for modulation induced frequency shift during transmission of a radio frequency signal |
CN200780010883.2A CN101411076B (en) | 2006-02-03 | 2007-02-02 | System and method for compensating for modulation induced frequency shift during transmission of a radio frequency signal |
EP07763536A EP1994646A1 (en) | 2006-02-03 | 2007-02-02 | System and method for compensating for modulation induced frequency shift during transmission of a radio frequency signal |
PCT/US2007/002833 WO2007092282A1 (en) | 2006-02-03 | 2007-02-02 | System and method for compensating for modulation induced frequency shift during transmission of a radio frequency signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/346,991 US8000667B2 (en) | 2006-02-03 | 2006-02-03 | System and method for compensating for modulation induced frequency shift during transmission of a radio frequency signal |
Publications (2)
Publication Number | Publication Date |
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US20070197172A1 US20070197172A1 (en) | 2007-08-23 |
US8000667B2 true US8000667B2 (en) | 2011-08-16 |
Family
ID=38181095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/346,991 Active 2027-11-26 US8000667B2 (en) | 2006-02-03 | 2006-02-03 | System and method for compensating for modulation induced frequency shift during transmission of a radio frequency signal |
Country Status (4)
Country | Link |
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US (1) | US8000667B2 (en) |
EP (1) | EP1994646A1 (en) |
CN (1) | CN101411076B (en) |
WO (1) | WO2007092282A1 (en) |
Cited By (8)
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US9576408B2 (en) | 2014-07-30 | 2017-02-21 | Gentex Corporation | Battery powered trainable remote garage door opener module |
US9715772B2 (en) | 2013-11-15 | 2017-07-25 | Gentex Corporation | Internet-connected garage door control system |
US10997810B2 (en) | 2019-05-16 | 2021-05-04 | The Chamberlain Group, Inc. | In-vehicle transmitter training |
US11024192B2 (en) | 2016-06-07 | 2021-06-01 | Gentex Corporation | Vehicle trainable transceiver for allowing cloud-based transfer of data between vehicles |
US11074773B1 (en) | 2018-06-27 | 2021-07-27 | The Chamberlain Group, Inc. | Network-based control of movable barrier operators for autonomous vehicles |
US11220856B2 (en) | 2019-04-03 | 2022-01-11 | The Chamberlain Group Llc | Movable barrier operator enhancement device and method |
US11423717B2 (en) | 2018-08-01 | 2022-08-23 | The Chamberlain Group Llc | Movable barrier operator and transmitter pairing over a network |
US11778464B2 (en) | 2017-12-21 | 2023-10-03 | The Chamberlain Group Llc | Security system for a moveable barrier operator |
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WO2005002080A1 (en) * | 2003-05-28 | 2005-01-06 | Johnson Controls Technology Company | System and method for receiving data for training a trainable transmitter |
US10514816B2 (en) | 2004-12-01 | 2019-12-24 | Uber Technologies, Inc. | Enhanced user assistance |
US10445799B2 (en) | 2004-09-30 | 2019-10-15 | Uber Technologies, Inc. | Supply-chain side assistance |
US10687166B2 (en) | 2004-09-30 | 2020-06-16 | Uber Technologies, Inc. | Obtaining user assistance |
US7922086B2 (en) | 2004-09-30 | 2011-04-12 | The Invention Science Fund I, Llc | Obtaining user assistance |
US8538331B2 (en) * | 2006-03-24 | 2013-09-17 | The Invention Science Fund I, LC | Vehicle control and communication via device in proximity |
US8358976B2 (en) | 2006-03-24 | 2013-01-22 | The Invention Science Fund I, Llc | Wireless device with an aggregate user interface for controlling other devices |
US8126400B2 (en) * | 2006-03-24 | 2012-02-28 | The Invention Science Fund I, Llc | Method for an aggregate user interface for controlling other devices |
US8180293B2 (en) * | 2006-03-24 | 2012-05-15 | The Invention Science Fund I, Llc | Vehicle control and communication via device in proximity |
US8195106B2 (en) * | 2006-05-31 | 2012-06-05 | The Invention Science Fund I, Llc | Vehicle control and communication via device in proximity |
US9430945B2 (en) * | 2006-12-20 | 2016-08-30 | Johnson Controls Technology Company | System and method for providing route calculation and information to a vehicle |
ATE543691T1 (en) | 2006-12-20 | 2012-02-15 | Johnson Controls Tech Co | REMOTE DISPLAY PLAYBACK SYSTEM AND METHOD |
US9587958B2 (en) * | 2007-01-23 | 2017-03-07 | Visteon Global Technologies, Inc. | Mobile device gateway systems and methods |
US9324230B2 (en) | 2008-12-04 | 2016-04-26 | Gentex Corporation | System and method for configuring a wireless control system of a vehicle using induction field communication |
EP2229576B1 (en) | 2007-12-05 | 2016-04-13 | Visteon Global Technologies, Inc. | Vehicle user interface systems and methods |
US8970352B2 (en) * | 2012-10-23 | 2015-03-03 | GM Global Technology Operations LLC | Remote activated garage door opener functions via a graphical user interface in a vehicle |
WO2014074094A1 (en) * | 2012-11-07 | 2014-05-15 | Johnson Controls Technology Company | Frequency shifting method for universal transmitters |
EP3132435B1 (en) * | 2014-04-18 | 2020-06-03 | Gentex Corporation | Trainable transceiver and mobile communications device diagnostic systems and methods |
US9552559B2 (en) | 2014-05-06 | 2017-01-24 | Elwha Llc | System and methods for verifying that one or more directives that direct transport of a second end user does not conflict with one or more obligations to transport a first end user |
US9483744B2 (en) | 2014-05-06 | 2016-11-01 | Elwha Llc | Real-time carpooling coordinating systems and methods |
US10458801B2 (en) | 2014-05-06 | 2019-10-29 | Uber Technologies, Inc. | Systems and methods for travel planning that calls for at least one transportation vehicle unit |
US11100434B2 (en) | 2014-05-06 | 2021-08-24 | Uber Technologies, Inc. | Real-time carpooling coordinating system and methods |
US9812005B1 (en) * | 2014-09-19 | 2017-11-07 | Silca S.P.A. | Method for creating a rolling code radio control |
SG10201509972YA (en) * | 2015-12-04 | 2016-09-29 | Huawei Internat Pte Ltd | Asynchronous transmission for nfc card emulation mode |
EP3939023B1 (en) * | 2019-04-30 | 2024-01-17 | Gentex Corporation | Vehicle trainable transceiver having a programmable oscillator |
US20200410794A1 (en) * | 2019-06-25 | 2020-12-31 | Microchip Technology Incorporated | Configurable access controller, and related systems, methods, and devices |
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Cited By (13)
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---|---|---|---|---|
US9715772B2 (en) | 2013-11-15 | 2017-07-25 | Gentex Corporation | Internet-connected garage door control system |
US10339734B2 (en) | 2013-11-15 | 2019-07-02 | Gentex Corporation | Internet-connected garage door control system |
US9576408B2 (en) | 2014-07-30 | 2017-02-21 | Gentex Corporation | Battery powered trainable remote garage door opener module |
US10134213B2 (en) | 2014-07-30 | 2018-11-20 | Gentex Corporation | Battery powered trainable remote garage door opener module |
US11024192B2 (en) | 2016-06-07 | 2021-06-01 | Gentex Corporation | Vehicle trainable transceiver for allowing cloud-based transfer of data between vehicles |
US11778464B2 (en) | 2017-12-21 | 2023-10-03 | The Chamberlain Group Llc | Security system for a moveable barrier operator |
US11074773B1 (en) | 2018-06-27 | 2021-07-27 | The Chamberlain Group, Inc. | Network-based control of movable barrier operators for autonomous vehicles |
US11763616B1 (en) | 2018-06-27 | 2023-09-19 | The Chamberlain Group Llc | Network-based control of movable barrier operators for autonomous vehicles |
US11423717B2 (en) | 2018-08-01 | 2022-08-23 | The Chamberlain Group Llc | Movable barrier operator and transmitter pairing over a network |
US11869289B2 (en) | 2018-08-01 | 2024-01-09 | The Chamberlain Group Llc | Movable barrier operator and transmitter pairing over a network |
US11220856B2 (en) | 2019-04-03 | 2022-01-11 | The Chamberlain Group Llc | Movable barrier operator enhancement device and method |
US11462067B2 (en) | 2019-05-16 | 2022-10-04 | The Chamberlain Group Llc | In-vehicle transmitter training |
US10997810B2 (en) | 2019-05-16 | 2021-05-04 | The Chamberlain Group, Inc. | In-vehicle transmitter training |
Also Published As
Publication number | Publication date |
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EP1994646A1 (en) | 2008-11-26 |
US20070197172A1 (en) | 2007-08-23 |
WO2007092282A1 (en) | 2007-08-16 |
CN101411076B (en) | 2013-06-19 |
CN101411076A (en) | 2009-04-15 |
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